TechBrief — تازه‌ترین اخبار فناوری

One of China’s Most Powerful AI Models Has Also Escaped Containment

Security researchers say that Kimi K3, an open-weight model from China, wandered off to the internet in an attempt to cheat on a test it was given.

Meta Ordered to Pay $942M to Address Harm to Kids from Social Media

Article URL: https://www.wsj.com/tech/meta-ordered-to-pay-942-million-to-address-harm-to-kids-from-social-media-8ba5aab7

Comments URL: https://news.ycombinator.com/item?id=49204352

Points: 66

# Comments: 29

Spin audit of SQD/QSCI quantum-chemistry benchmarks on iron–sulfur clusters

Author here.

Background, for anyone who hasn't followed this fight: IBM's iron–sulfur SQD results (Sci. Adv. 2025) are one of the flagship "quantum computers are useful for chemistry now" claims, and a published critique (arXiv:2501.07231) argues the quantum samples never beat classical selected-CI at matched cost. That argument is still live.

Both sides have been arguing about energies. Neither measured which electronic state these calculations actually converge to.

So I measured it. ⟨S²⟩ comes out between 4.7 and 7.0 depending on the system and the subspace size, where the target these papers name is a singlet at ⟨S²⟩ = 0. Every starting guess I tried lands in the same place, and the error at convergence is about the size of the spin-state ladder itself, which is the physics under dispute.

IBM ships a mitigation for this. Run exactly as shipped, using their driver, their recovery loop and their own spin_square() diagnostic, it moves the ground energy by under a nanohartree while making the subspace 4.00x bigger: 194,481 determinants against 48,600. It makes a singlet representable. It never produces one. Their solver also takes a spin_sq argument that would target the singlet directly, and the default pipeline never sets it.

I filed that narrow part on their tracker yesterday, before posting this: https://github.com/Qiskit/qiskit-addon-sqd/issues/337. A maintainer answered and closed it the same day, and his answer is the useful part. The flag, in his words, augments the sampled subspace by using alpha CI strings as beta strings and vice versa. That is a statement about which determinants span the space, not about what spin the returned state comes out in, which is exactly what the measurement says. He did not contest the numbers. The second question, whether the default path is meant to reach spin_sq at all, is still unanswered.

The obvious objection is that this is all my own reimplementation, so here's the part that isn't. IBM's data-availability archive for the flagship paper contains the raw hardware measurement records: 2,457,600 shots on [2Fe-2S] from December 2023, 3,163,742 outcomes on [4Fe-4S] from April 2024, plus the integrals and the optimized circuit's parameters. Running their shots through their own pipeline, [2Fe-2S] reaches low ⟨S²⟩ but sits 248 mHa off their own reference, and [4Fe-4S] converges to a spin-pure triplet, Var(S²) = 3e-6, a genuine S=1 eigenstate: a clean state, and the wrong one, 1,438 mHa from their reference.

Two things in that archive need no analysis from me at all. Their uniform-random null control matches or beats the hardware samples in every published [2Fe-2S] comparison. And their largest [4Fe-4S] runs, at subspace dimension 10⁸, trail their own classical HCI file by 149 mHa.

On the AI angle, since that's half of why this is on HN: Claude did the initial audit end to end in about 72 hours under my direction, and it's been through many rounds of adversarial review since. The part I'd defend as actually interesting isn't the speed. It caught five defects in its own work through pre-registered validation gates, one of them by cross-checking against IBM's own published energy tables, and it retracted its own strongest pro-quantum finding when the new instrument showed that result was a spin-sector artifact. AUDIT_TRAIL.md has the timeline. REPRO_MAP.md maps every claim to a file and a command that regenerates it.

If you want to kill this, and I mean that, here's how. Exhibit any state in a spin-completed ground manifold of these benchmarks with ⟨S²⟩ < 1. Or show me a quantum-sampled subspace at matched determinant count whose spin-identified energy beats HCI or CIPSI. Or get any shipped-pipeline run on IBM's archived samples to land ⟨S²⟩ < 1 and error under 50 mHa at once, with no spin penalty. The harness is in the archive and I'll publish whatever comes back, including if it's me who's wrong.

Preprint: https://doi.org/10.26434/chemrxiv.15006382/v1

The limitations section is real: comparison dimensions are fixed, the [4Fe-4S] reference is approximate, and the 58.6M "samples" file is deduplicated, so the shot-level distribution of their optimal-circuit numerics isn't publicly auditable. It's short. Worth reading before the hot take.

Comments URL: https://news.ycombinator.com/item?id=49203707

Points: 7

# Comments: 1

OpenAI’s new AI smart speaker will reportedly sell for between $300 and $400

Additional details about OpenAI's mysterious new AI device make it sound like a pricey smart speaker.

Organ donation group accused of trying to take living man's organs faces shutdown

The organization, Network for Hope, "strongly disagrees" with Trump admin's decision.

Explosive drone found hovering near Ukrainian cargo aircraft at German airport

Russian attack? Explosive drone targeted parked aircraft at Leipzig airport.

Your table awaits: Exhibit at TechCrunch Disrupt 2026 to be seen by thousands 

Not everyone needs a keynote slot to make noise at TechCrunch Disrupt 2026. Sometimes the best way to meet investors, customers, and partners is by exhibiting directly on the Expo Hall floor at San Francisco’s Moscone West from October 13-15. That’s exactly what our Exhibit Program offers, and it’s still open to showcase your startup.  Here’s what $12,500 buys you:  Joining fellow exhibitors is the fastest, lowest-lift way for a […]

Welcoming the Nepalese Government to Have I Been Pwned

Article URL: https://www.troyhunt.com/welcoming-the-nepalese-government-to-have-i-been-pwned/

Comments URL: https://news.ycombinator.com/item?id=49203105

Points: 89

# Comments: 15

Hackers Stalked Me by Hijacking a Smartwatch for Kids

Security researchers tracked and eavesdropped on a WIRED reporter using vulnerabilities in a pink plastic smartwatch. It’s just one piece of a deeply insecure supply chain of GPS-enabled gadgets.

Inside vLLM: Anatomy of a High-Throughput LLM Inference System (2025)

Article URL: https://www.aleksagordic.com/blog/vllm

Comments URL: https://news.ycombinator.com/item?id=49202852

Points: 68

# Comments: 2